check this code ...its not running whats the bug in it?

Question

int func(int num)

{

int count = 0;

while (num)

{

count++;

num >>= 1;

}

return (count);

}

Answer 1

Here count is declared locally inside this function. If you try to return the local variable, the variable will be destroyed..

Answer 2

int func(int num)

{

  int count = 0;

  while (num)

  {

    count++;

    num >>= 1;

  }

  return (count);

}

The red color highlighted one is the reason for the error.

Answer 3

The condition isnt correctly cited in the while loop and num>>=1 condition is not a valid intruction, even I dont understand the meaning of this instruction...

Answer 4

This function is perfectly fine in C

Java requires that the conditional in the while loop be converted to a boolean expression.

Java:

class Main {

public static void main(String [] args) {
   System.out.println(func (5));
}

static int func (int num) {
  int count = 0;
  while (num>0)  {
      count++;
      num >>= 1;
      System.out.println(num);
    }
  return (count);
}

}

output: 2 1 0 3

C version:

#include <stdio.h>
int func (int num) {
  int count = 0;
  while (num)  {
      count++;
      num >>= 1;
      printf("%d\n", num);
    }
  return (count);
}

int main()
{
    printf("%d\n", func(5));
    return 0;
}

output: 2 1 0 3